How do they get their banging bodies? Besides genetics, most are dedicated to their workouts — everything from Pilates to yoga to jogging to group classes like DanceBody and sessions with personal trainers keep these ladies fit. And, of course, there are the strict diets some follow, including intermittent fasting, vegan-based eating and more. Scroll through to see the amazing bikini bodies of celebs in their fourth decade — and get your own nutrition and fitness tips!